Photo Library permissions - Why is my app not showing in the Settings app? (iOS 12.1 Xcode 10.1)

Question

My app isn't showing in the iPhone's Settings app (similar issue on both physical device & simulator). I'm using Xcode 10.1 & iOS 12.1.

It needs to save photos to the user's photo library so I added the right keys (listed below) in the info.plist but I never get the Photo library permission prompt.

NSAppleMusicUsageDescription
NSCameraUsageDescription
NSMicrophoneUsageDescription
NSPhotoLibraryAddUsageDescription
NSPhotoLibraryUsageDescription

(I think some of them aren't needed at all but adding them still didn't fix anything).

I tried to force-open the Settings app like shown below. That opens the Settings app but the app I'm working on doesn't appear there.

guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
      print("Couldn't load settingsURL")
      return
}

if UIApplication.shared.canOpenURL(settingsUrl) {
      UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                            print("Settings opened: \(success)")
      })
}

As a result, I cannot debug the permissions and the app continues to crash when I try to write an image to the photo library.

Any suggestions are welcome.

Answer 1

Solved: I figured that the app only appears in Settings after the first request for permission occurs.

Using this code solved it.

PHPhotoLibrary.requestAuthorization { (status) in
    print("Status: \(status)")
}

After I called this once, the app showed properly in Settings and it doesn't crash anymore when saving the image to disk.